Poster title: The shadowed ring of DoAr44

Poster abstract: Optical/IR images of transition disks (TDs) have revealed deep decrements in the outer regions of 
HAeBes HD142527 and HD100453, that can be interpreted as shadowing from sharply tilted inner disks, such that the 
outer disks are directly exposed to stellar light.  We report similar dips in SPHERE+IRDIS differential polarized imaging 
(DPI) of TTauri DoAr44.  With a fairly axially symmetric and face-on ring in the sub~mm radio continuum, we propose that 
DoAr~44 is also a warped system.  We constrain the warp geometry by comparing radiative transfer predictions with the 
DPI data in H band. An inner disk tilt of 30+-5deg accounts for the shape of the DPI decrements.  The observed DPI 
shadows are much deeper than in the radio: while the intensity drops by ~88% in the DPI images, the radio decrements 
are relatively shallow with a drop of ~25% at 330GHz.  This is consistent with the RT predictions. ALMA long-baseline 
observations should allow the observation of the warped gas kinematics inside the cavity of DoAr44.